The following methods allow you to remove old and inaccurate DNS information that may result in 404 errors.
Windows® 8
Press Win+X to open the WinX Menu.
Right-click on Command Prompt and select Run as Administrator.
Type the following command and press Enter: ipconfig /flushdns
If the command was successful, you will see the following message:
Windows IP configuration successfully flushed the DNS Resolver Cache.
Windows 7
Click the Start button.
Enter cmd in the Start menu search field.
Right-click on Command Prompt and select Run as Administrator.
Type the following command and press Enter: ipconfig /flushdns
If the command was successful, you will see the following message:
Windows IP configuration successfully flushed the DNS Resolver Cache.